Electric terminal.



G. C. LANDIS.

ELECTRIC TERMINAL.

APPLICATION FILED APB. s, 1907.

aff/WWA Patented May 25, 1909.

lll

UNITED STATES' -IATEN'I OFFICE.'-

GILBERT C. LANDIS,YOF YORK, PENNSYLVANIA, ASSIGNOR TO` AMERICANPHOKSPHORUS COMPANY, OF CAMDEN, NEW JERSEY, A CORPORATION OF NEW JERSEY.

ELECTRIC TERMINAL.

.Specification of Letters Patent. l

I .Patented May 25, 1909.

Application led April 3, 1907. lSerial No. 886,152.

To all whom it may concern:

Be it known that I, GILBERT C. LANnIs, a citizen of the United States,residing in York, Pennsylvania, have invented certain Improvements inElectric Terminals, of which the following is a specification.

The object of my invention is to so construct an electric terminal, thatthe carbon electrode can be readily and firmly attached to the terminaland which is so designed that it will be prevented from becoming overlheated.

My invention is particularly adapted for use 1n connection with electricfurnaces.

In the accompanying drawings, Fig-ure l, is

a vertical sectional view, illustrating my improved electric terminalwith the carbon electrode attached; Fig. 2, is an inverted plan view ofFig. l Fig. 3, is a side View, showing my improved terminal applied toan electric furnace, and Figs. 4 and 5, are views, showing modificationsof the invention.

A is a carbon electrode, in the present instance, circular in crosssection, as illustrated in Fig. 2.

B is the terminal to which the electrode is attached. This terminal hasa body portion B and a cap C. The body portion has a cavity a in itsunder side of any depth desired for the reception of the carbonelectrode and the cavity is somewhat larger than the electrode so thatwhen the carbon is placed in the electrode molten metal r of relativelylow fusing point can be poured into the space between thc side walls ofthe cavity and the electrode so as to firmly secure the electrode to theterminal when the molten metal is set.

The body B of the terminal is made in the form of a cup with a ange b onits upper edge and the central portion b2, in which the electrode ismounted, projects up into the cup, as shown, and the cavity a is formedin this portion b2.. The cap C is secured to the body portion l) bybolts c; a gasket E being used when necessary so as to make atight jointto prevent the escape of water.

i is a water inlet pipe and i is a water outlet ipe. These water pipes iand i are attac ed to the supply and waste pipes by flexible connectionsso as not to interfere With the vertical adjustment of the electrode.Thus water is allowed to flow through the terminal and to ll thecup-like body portion B", keeping the wall of the portion b2 containingthe electrode from becoming overheated.

Connection is made with the electric conductorthrough an arm b, whichreferably forms part ofthe body portion Iii and secured to this arm is aplate F having an opening f for the conductor and this plate is securedto the arm by a boltj" having a suitable nutfz.

In thepresent instance, projecting'from` each side of the ca C areextensions c in which are openings or the vertical guides C, illustrated1n Fig. 3, and screwed into a boss c on the cap is a screw eye or hookc2 to Which can be attached a rope or cord assing to a drum orcounterbalance weight or vertically adjusting the electrode carried bythe terminal in respect to the fixed electrode in the furnace.

The vertical guides in the present instance are tubes which are slip edover studs g projectingv from the plate supporting the lgas seal G. Theupper ends of-thesetubular guides are secured to a beam C2 in any suitable manner. By this means the terminal is held in roper position inrespect to the body of the ectric furnace, as clearly illustrated inFig. 3.

I have shown in Fig. 3, the upper porticA of one form of electricfurnace to which my invention can be applied, but it will be understoodthat my improved electric terminal can be used for any urpose withoutdeparting from the essential) features of my invention.

In Fig. 2, the carbon electrode is shown round and the terminal iscircular, but in some instances the electrodes may be square in crosssection, then I prefer to make the terminal square to fit the electrode,as shown in Fig. 4, although the opening for the reception of theelectrode may be quadrangular and the other portions of the terminal maybe of any shape desired.

In Fig. 5, I have shown a modification in which the end of the electrodeA is threaded, as at a', and this threaded portion is mounted Within thecavity a of the terminal and metal in a molten state is poured aroundthe threaded portion so as to retain the electrode in place.

hen long electrodes are used I preferably make them in sections; thethreaded portion a of one section extending in a threaded cavity a2 inan adjoining section so that the sections can be readily coupled one toanother and when one is worn away another can be substituted for it.This construction is clearly illustrated in Fig. 3.

1. The combination in an electric terminal, of a body ortion having acavity in its under side for t e reception of an electrode, said bodyportion being in the forni of a cup to retain water, the part in whichthe electrode is heldextending into the cup, with an inlet and an outletconduit in the body portion for cooling liquid, said liquid surroundingthe portion to which the electrode is attached, with a cap closing thecup-shaped body portion and removable independently of said conduits,substantially as described.

2. The combination in an electric terminal, of a hollow body portionhaving its under side extended inwardly to form a cavity, an electrodemounted in the cavity and secured to the body portion, circulating pipesconimunicating with the body portion, an integral arm projecting fromthe body portion, a terminal late secured to the arm, and a cap detachaby secured to the body portion, substantially as described` 3. Thecombination in an electric terminal, of a iianged hollow body portionhaving a cavity in its under side, a carbon electrode mounted in thecavity, and metal introduced between the electrode and the terminalwhile in a fluid state, Water circulating pipes communicating with theinterior of the body portion, a cap secured to the body portion havingmeans by Which the terminal is suspended, with a terminal plateconnected to the body port-ion independently of the cap, substantiallyas described.

4. The combination in an electric terminal, of a hollow body portionhaving a cavity in its under side, a carbon electrode mounted in therecess, said recess being of greater diameterl than the electrode, withsoft metal introduced between the walls of the cavity and the electrode,circulating pipes entering the body portion, a cap plate secured to thebody portion of the terminal and having perforated extensions, guiderods passing through the extensions, an arm on the body portionindependent of the cap plate, and a terminal plate secured to the arm,substantially as described.

5. The combination of an electric furnace, a plate mounted on thefurnace having an opening for the passage of an electrode, studsprojecting from the plate, vertical guide rods mounted on the studs asupporting structure engaging the upper ends of said rods, a terminalmounted on the rods, and an electrode carried by the terminal,substantially as described.

In testimony whereof, I have signed my name to this speciiication, inthepresence of two subscribing witnesses.

GILBERT C. LANDIS.

Witnesses Jos. H. KLEIN, WM. A. BARR.

